We know Nvidia, they'll throw money at developers to get them to use their proprietary RT, yes it'll be a hell of a lot more effort on the developers part, but unfortunately money talks, and the publishers have their grip on that.
Publishers mean jank. It's the devs. I'm not sure how much Nvidia pay but it's clearly not enough or often enough and they get greedy.
What I mean is they paid for devs to support SLi right? However as soon as the DX11 dev cycle ended that was the end of that. Anyone who buys two GPUs now is either rich, stupid or both of the above. It simply doesn't work any more and AMD gave up on Crossfire also.
The way consoles are going we'll see more of the same. When the RTX cores do nothing they literally do absolutely nothing. This isn't the issue though. The issue is when they are doing nothing and it's level pegging the 5700XT is up there with the 2080 Super.
And that isn't going to change much, because every platform will be more important than a niche technology unique to one platform. A very small percentage of that platform also, given Nvidia sell non RT cards that are very good right now.
As I said, Nvidia can't afford to throw millions at devs (and buy codes to give away etc) on every game. And even if they could eventually GPUs would get even more expensive to fund the habit.
Realistically? RTX is a ticking timebomb. And it'll tick way faster once these two new consoles come along and have RT. Right now? OK look, think about it like this. Imagine what sort of console Sony and Nvidia could provide for the price of a 2080ti. Not that I'm staying they'll be that much but yeah. XB1X does decent 4k right? Better than Stadia. It cost £450 at launch. Now double that budget now. It would demolish a GPU purchase.
We also know consoles are getting NVME etc so the excuses to build a PC costing twice as much becomes less worth it.
What I mean is, when the XB1X launched a whole ton of smart arse YT people tried to build a gaming PC for $450 that could beat it. They couldn't even get remotely close. None could run any sort of 4k at any settings it was completely out of the question.
Consoles were easy to beat price to performance up until that point and that gap will become a chasm when the next gen launch. Especially with GPU prices as they are.